Axle suspension system

Patent metadata

Field	Value
Publication number	US-12594801-B2
Application number	US-202418893155-A
Country	US
Kind code	B2
Filing date	Sep 23, 2024
Priority date	Sep 22, 2023
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

An axle suspension system is suited for a trailer including a trailer frame, an axle, and left and right wheels respectively connected on opposite ends of the axle. The axle suspension system includes a swing arm pivotably securable at one end to the trailer frame and connectable at an opposite end to the axle via a connector. The connector includes a bottom surface connected to the swing arm. A spring is connected at one end to the swing arm and is connectable at an opposite end to the trailer frame. A resilient pad may be secured between the bottom surface of the connector and the swing arm. In some arrangements, a track bar may be securable at one end to the axle and may be secured at an opposite end to the swing arm.

First claim

The invention claimed is:

1 . An axle suspension system for a trailer including a trailer frame, an axle, and left and right wheels respectively connected on opposite ends of the axle, the axle suspension system comprising:
a swing arm pivotably securable at one end to the trailer frame and connectable at an opposite end to the axle; a spring connected at one end to the swing arm and connectable at an opposite end to the trailer frame; and a track bar securable at one end to the axle and secured at an opposite end to the swing arm, wherein the track bar is pivotably securable at the one end to the axle on a first substantially vertical axis and pivotably secured at the opposite end to the swing arm on a second substantially vertical axis.

2 . An axle suspension system according to claim 1 , further comprising a track bar bracket welded to the swing arm adjacent the trailer frame, wherein the track bar is pivotably secured to the track bar bracket.

3 . An axle suspension system according to claim 1 , wherein the track bar is securable at the one end to the axle adjacent a distal end of the axle and is secured at the opposite end to the swing arm adjacent the trailer frame.

4 . An axle suspension system according to claim 1 , wherein the swing arm is connectable at the opposite end to the axle via a connector, wherein the connector includes a bottom surface connected to the swing arm, the axle suspension system further comprising a resilient pad secured between the bottom surface of the connector and the swing arm.

5 . An axle suspension system according to claim 4 , wherein the resilient pad is configured to permit the connector to deflect to a position that is non-parallel with the swing arm.

6 . A trailer comprising:
a trailer frame; an axle; left and right wheels respectively connected on opposite ends of the axle; and an axle suspension system for each of the left and right wheels, each axle suspension system including:
a swing arm pivotably secured at one end to the trailer frame and connected at an opposite end to the axle via a connector, wherein the connector includes a bottom surface connected to the swing arm and an upper surface engageable with the axle,
a spring connected at one end to the swing arm and connected at an opposite end to the trailer frame, and
a resilient pad secured between the bottom surface of the connector and the swing arm; and
a track bar secured at one end to the axle and secured at an opposite end to the swing arm, wherein the track bar is pivotably secured at the one end to the axle and pivotably secured at the opposite end to the swing arm.

7 . A trailer according to claim 6 , comprising a second axle and second left and right wheels connected on opposite ends of the second axle, the trailer further comprising a second axle suspension system for each of the second left and right wheels.

Assignees

• Lippert Components Inc

Inventors

• Schultz Timothy D
• Shotwell John

Classifications

• B60G2202/12

  Wound spring · CPC title

• B60G2204/1482

  on rigid axle by elastic mount · CPC title

• B60G2204/4302

  for fixing suspension arm on the vehicle body or chassis · CPC title

• B60G2300/04

  Trailers · CPC title

• B60G9/003 Primary

  the axle being rigidly connected to a trailing guiding device · CPC title